stevens



G. H. STEVENS,

or LOWELL,

WISCONSIN.

BORING AND MORTISING MACHINE.

Speccation of Letters Patent No. 16,101, dated November 18, 1856.

To @ZZ whom it may concern;

Be it known that I, Gr. H. STEVENS, ofl

Lowell, in the county of Dodge and State of W'isconsin, have invented anew and Improved Mortising-Machine; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the annexed drawing, making a part of this specification,said drawing being a vertical section of my improvement.

My invention consists in the employment or use of an auger or bit andhollow chisel arranged and operated in a peculiar way as will behereinafter fully shown and described.

To enable those skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

A represents a rectangular frame, in which a sliding frame B is fitted.This frame is allowed to slide freely up and down within the frame A.

C, D, represent two shafts which are placed transversely in the frame Band connected at one end by toothed wheels E, F. The shaft C has a crank(a.) at its center' and a pitman Gr is attached to this crank, the upperend of the pitman being attached to the arm (b) of a hammer H, a spring(c) being attached to the arm (b) and frame B.

The shaft D has a bevel wheel I upon it, and the wheel I gears into ahorizontal wheel J which is placed upon the upper end of a verticalauger or bit K, the bearing (d) of said auger or bit being on the frameB. To the lower part of the frame A a vertical rack L is attached. Thisrack gears into a wheel I also placed on the shaft D.

M represents a shaft the upper end of which is attached to the frame B.The

lower end of this shaft has a hollow rectangular chisel N attached toit, the auger or bit K being within the chisel N. A rectangular opening(e) is made through the base of the frame A and a weight 0 is attachedt-o the frame B.

The operation of the machine will be readily seen. As the shaft D isrotated, motion is communicated to the shaft C, and the hammer H isoperated by the crank (a) and pitman G. The auger or bit K is ro tatedby the wheels I, J. The stuff to be mortised is placed underneath theframe A and the auger or bit bores the hole while the chisel N inconsequence of being acted on by the hammer H is driven down and makes arectangular mortise, the chisel squaring the round hole made by theauger' or bit. The frame B is fed downward as the work progresses inconsequence of the wheel I gearing into the rack L.

The above machine is simple in construction and operates well. It may beconstructed at a moderate cost and there are no parts liable to get outof repair.

I am aware that the hollow chisel and bit have been previously used, andI therefore do not claim those parts irrespective of the node ofarranging and operating the same;

What I do claim as new and desire t-o secure by 'Letters Patent, is

Attaching the auger or bit K, chisel N, and hammer H, to the slidingframe B, and operating the auger or bit, hammer and frame as hereinshown and described for the purpose specified.

G. H. STEVENS.

Witnesses:

HARRIET PAGE, E. B. BOWEN.

